TWI475247B - An optical imaging lens and an electronic device to which the optical imaging lens is applied - Google Patents

Description

Optical imaging lens and electronic device using the same

The present invention relates to an optical lens, and more particularly to an optical imaging lens and an electronic device using the same.

In recent years, the popularity of portable electronic products such as mobile phones and digital cameras has led to the development of image module related technologies. The image module mainly includes an optical imaging lens, a module holder unit and a sensor. And other components, and the thin and light trend of mobile phones and digital cameras also make the demand for miniaturization of image modules higher and higher, with the charge coupled device (Charge Coupled Device, CCD for short) or complementary metal oxide semiconductor components (Complementary) Metal-Oxide Semiconductor (referred to as CMOS) technology advancement and downsizing, the optical imaging lens mounted in the image module also needs to be shortened accordingly, but in order to avoid the photographic effect and quality degradation, shorten the length of the optical imaging lens It is still necessary to balance good optical performance.

U.S. Patent Publication No. 8000031 and Japanese Patent Publication No. 4847172 disclose an optical lens composed of five lenses, the distance from the object side of the first lens to the imaging surface on the optical axis is large, which is disadvantageous for mobile phones and Thin design of portable electronic products such as digital cameras.

So how can we effectively reduce the length of the optical lens system, At the same time, it is still an urgent issue for the industry to maintain sufficient optical performance.

Therefore, the object of the present invention is to provide a shortening mirror Under the condition of the length of the head system, the optical imaging lens can still maintain good optical performance.

Thus, the optical imaging lens of the present invention is sequentially from the object side to the image side The first lens, the second lens, the third lens, the fourth lens, and the fifth lens are included, and the first lens to the fifth lens both include an object side and image light. The side of the object that passes through, and an image side that faces the image side and allows imaging light to pass.

The side surface of the first lens has a region near the circumference a convex surface of the domain; the image side of the third lens has a convex portion located in the vicinity of the optical axis; the image side of the fourth lens has a concave surface located in the vicinity of the optical axis; and a material of the fifth lens For plastic.

Wherein the optical imaging lens has a refractive index lens only Five pieces, each of the first, second, third, fourth, and fifth lenses has an air gap, and the four air gaps of the first lens to the fifth lens on the optical axis are summed to Gaa, the second The air gap between the lens and the third lens on the optical axis is G23, and the following conditional expression is satisfied: Gaa/G23 ≦ 6.50.

The beneficial effects of the optical imaging lens of the invention are: first through The side surface of the mirror has a convex portion located in the vicinity of the circumference, the image side of the third lens has a convex portion located in the vicinity of the optical axis, and the image side of the fourth lens has a concave portion located in the vicinity of the optical axis And match The aperture is placed between the first lens and the second lens to facilitate the correction of the aberration to ensure the imaging quality of the optical imaging lens. In addition, the fifth lens is made of plastic, which reduces manufacturing costs and reduces the weight of the optical imaging lens.

Therefore, another object of the present invention is to provide an application The electronic device of the aforementioned optical imaging lens.

Thus, the electronic device of the present invention comprises a casing, and a An image module installed in the casing.

The image module includes an optical imaging mirror as described above a head, a lens barrel for the optical imaging lens, a module rear seat unit for the lens barrel, and an image sensor disposed on the image side of the optical imaging lens.

The beneficial effects of the electronic device of the present invention are: by the electricity The sub-device is loaded with the image module having the optical imaging lens described above, so that the imaging lens can provide good optical performance under the condition of shortening the length of the system, and can be produced without sacrificing optical performance. The thin and light electronic device enables the invention to have good practical performance and contribute to the structural design of light, thin and short, and can meet the higher quality consumer demand.

10‧‧‧Optical imaging lens

2‧‧‧ aperture

3‧‧‧first lens

31‧‧‧ ‧ side

311‧‧‧ convex face

32‧‧‧like side

4‧‧‧second lens

41‧‧‧ ‧ side

411‧‧‧ convex face

412‧‧‧ concave face

42‧‧‧like side

5‧‧‧ third lens

51‧‧‧ ‧ side

52‧‧‧like side

521‧‧‧ convex face

6‧‧‧Fourth lens

61‧‧‧ ‧ side

611‧‧‧ convex face

612‧‧‧ concave face

613‧‧‧ concave face

62‧‧‧like side

621‧‧‧ concave face

622‧‧‧ convex face

7‧‧‧ fifth lens

71‧‧‧ ‧ side

711‧‧ ‧ convex face

712‧‧‧ concave face

72‧‧‧like side

721‧‧‧ concave face

722‧‧‧ convex face

8‧‧‧Filter

81‧‧‧ ‧ side

82‧‧‧like side

9‧‧‧ imaging surface

I‧‧‧ optical axis

1‧‧‧Electronic device

11‧‧‧Shell

12‧‧‧Image Module

120‧‧‧Modular rear seat unit

121‧‧‧Lens rear seat

122‧‧‧Image sensor rear seat

123‧‧‧First body

124‧‧‧Second body

125‧‧‧ coil

126‧‧‧ Magnetic components

130‧‧‧Image Sensor

21‧‧‧Mirror tube

II, III‧‧‧ axis

Other features and advantages of the present invention will be apparent from the detailed description of the preferred embodiments illustrated in the accompanying drawings in which: FIG. A first preferred embodiment of the imaging lens; FIG. 3 is a longitudinal spherical aberration and various aberration diagrams of the first preferred embodiment; Figure 4 is a table showing the optical data of the lenses of the first preferred embodiment; Figure 5 is a table showing the aspherical coefficients of the lenses of the first preferred embodiment; Figure 6 is a configuration BRIEF DESCRIPTION OF THE DRAWINGS FIG. 7 is a longitudinal spherical aberration and various aberration diagrams of the second preferred embodiment; FIG. 8 is a table diagram illustrating the second comparison. The optical data of each lens of the preferred embodiment; FIG. 9 is a table showing the aspherical coefficients of the lenses of the second preferred embodiment; FIG. 10 is a schematic view showing a third of the optical imaging lens of the present invention. Preferred Embodiments; FIG. 11 is a longitudinal spherical aberration and various aberration diagrams of the third preferred embodiment; FIG. 12 is a table diagram showing optical data of the lenses of the third preferred embodiment; FIG. Is a table showing the aspherical coefficients of the lenses of the third preferred embodiment; FIG. 14 is a schematic view showing a fourth preferred embodiment of the optical imaging lens of the present invention; FIG. 15 is the fourth comparison. The longitudinal spherical aberration and various aberration diagrams of the preferred embodiment; FIG. 16 is a table , Indicating that the optical data of each lens of the fourth preferred embodiment; FIG. 17 is a table diagram illustrating each lens of the fourth preferred embodiment of the FIG. 18 is a schematic view showing a fifth preferred embodiment of the optical imaging lens of the present invention; FIG. 19 is a longitudinal spherical aberration and various aberration diagrams of the fifth preferred embodiment; FIG. A table diagram illustrating optical data of the lenses of the fifth preferred embodiment; FIG. 21 is a table diagram illustrating aspherical coefficients of the lenses of the fifth preferred embodiment; FIG. 22 is a schematic configuration diagram illustrating A sixth preferred embodiment of the optical imaging lens of the present invention; FIG. 23 is a longitudinal spherical aberration and various aberration diagrams of the sixth preferred embodiment; and FIG. 24 is a table diagram illustrating the sixth preferred embodiment. Optical data of each lens; FIG. 25 is a table showing the aspherical coefficients of the lenses of the sixth preferred embodiment; FIG. 26 is a schematic view showing a seventh preferred embodiment of the optical imaging lens of the present invention. FIG. 27 is a longitudinal spherical aberration and various aberration diagrams of the seventh preferred embodiment; FIG. 28 is a table diagram showing optical data of each lens of the seventh preferred embodiment; FIG. 29 is a table. Figure for explaining the aspherical surface of each lens of the seventh preferred embodiment ; FIG. 30 is a configuration diagram described a preferred embodiment of the eighth embodiment of the optical imaging lens of the present invention; Figure 31 is a longitudinal spherical aberration and various aberration diagrams of the eighth preferred embodiment; Figure 32 is a table showing the optical data of the lenses of the eighth preferred embodiment; Figure 33 is a table diagram, The aspherical coefficients of the lenses of the eighth preferred embodiment are illustrated; FIG. 34 is a table showing the first to eighth preferred embodiments of the five-piece optical imaging lens. FIG. 35 is a cross-sectional view showing a first preferred embodiment of the electronic device of the present invention; and FIG. 36 is a cross-sectional view showing a second preferred embodiment of the electronic device of the present invention.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same reference numerals.

As used herein, "a lens having a positive refractive power (or a negative refractive power)" means that the lens has a positive refractive power (or a negative refractive power) in the vicinity of the optical axis. "The object side (or image side) of a lens has a convex portion (or concave surface) located in a certain area", which means that the area is more parallel to the optical axis than the outer side in the radial direction. In the case of "outwardly convex" (or "inwardly recessed"), FIG. 1 is exemplified, wherein I is an optical axis and the lens is radially symmetric with respect to the optical axis I as an axis of symmetry. The object side has a convex surface in the A area, the B area has a concave surface, and the C area has a convex surface because the A area is more parallel to the optical axis than the outer area (ie, the B area) in the radial direction immediately adjacent to the area. For outward convexity, zone B The domain is more inwardly recessed than the C region, and the C region is more outwardly convex than the E region. "Around area around the circumference" refers to the area around the circumference of the surface on which the imaging light passes only through the lens, that is, the C area in the figure, wherein the imaging light includes the chief ray Lc and the edge ray (marginal ray) ) Lm. The "area near the optical axis" refers to the area near the optical axis of the curved surface through which the imaging light passes, that is, the A area in FIG. In addition, the lens further includes an extension portion E for assembling the lens in an optical imaging lens. The ideal imaging light does not pass through the extension portion E. However, the structure and shape of the extension portion E are not limited thereto. In the following embodiments, the extensions are omitted for the sake of simplicity.

Referring to Figures 2 and 4, one of the optical imaging lenses 10 of the present invention In a first preferred embodiment, a first lens 3, an aperture 2, a second lens 4, a third lens 5, a fourth lens 6, and a first lens are sequentially disposed from the object side to the image side along an optical axis I. The fifth lens 7, and a filter 8. When light emitted by a subject enters the optical imaging lens 10, and passes through the first lens 3, the aperture 2, the second lens 4, the third lens 5, the fourth lens 6, the fifth After the lens 7, and the filter 8, an image is formed on an image plane 9. The filter 8 is an IR Cut Filter for preventing infrared rays in the light from being transmitted to the imaging surface 9 to affect image quality. It is added that the object side is the side facing the object to be photographed, and the image side is the side facing the image forming surface 9. It is specifically noted that the image sensor (not shown) used in the present invention adopts a COB (Chip on Board) package method, and the difference from the conventional CSP (Chip Scale Package) package method is that the COB package does not need to be required. Use cover glass, so The presence of cover glass is not required throughout the optical imaging lens.

The first lens 3, the second lens 4, the third lens 5, the fourth lens 6, the fifth lens 7, and the filter 8 respectively have an object side and allow imaging light to pass through. The object sides 31, 41, 51, 61, 71, 81, and an image side 32, 42, 52, 62, 72, 82 that face the image side and allow imaging light to pass therethrough. The side surfaces 31, 41, 51, 61, 71 and the image side surfaces 32, 42, 52, 62, 72 are all aspherical.

In addition, in order to meet the demand for light weight of the product, the first lens 3 to the fifth lens 7 are both made of a refractive index and are made of a plastic material, but the material is not limited thereto.

The first lens 3 is a lens of positive refractive power. The object side surface 31 of the first lens 3 is a convex surface, and the object side surface 31 has a convex surface portion 311 located in the vicinity of the circumference, and the image side surface 32 of the first lens 3 is a concave surface.

The second lens 4 is a lens of positive refractive power. The object side surface 41 of the second lens 4 is a convex surface, and the image side surface 42 of the second lens 4 is a convex surface.

The third lens 5 is a positive refractive power lens. The object side surface 51 of the third lens 5 is a concave surface. The image side surface 52 of the third lens 5 is a convex surface, and the image side surface 52 has a light axis. The convex portion 521 of the region.

The fourth lens 6 is a lens of negative refractive power. The object side surface 61 of the fourth lens 6 has a convex portion 611 located in the vicinity of the optical axis I, and a concave portion 612 located in the vicinity of the circumference. The image side surface 62 of the fourth lens 6 has an optical axis I. A concave portion 621 in the vicinity of the area, and a convex portion 622 located in the vicinity of the circumference.

The fifth lens 7 is a lens of positive refractive power. The fifth lens 7 The object side 71 has a convex portion 711 located in the vicinity of the optical axis I, and a concave portion 712 located in the vicinity of the circumference. The image side surface 72 of the fifth lens 7 has a concave portion 721 located in the vicinity of the optical axis I, and a convex portion 722 located in the vicinity of the circumference.

Other detailed optical data of the first preferred embodiment are shown in FIG. 4. As shown, the overall system focal length (EFL) of the first preferred embodiment is 2.00 mm, the half field of view (HFOV) is 48.622°, and the aperture value (Fno) is 2.40. Its system length is 4.04mm. The length of the system refers to the distance between the object side surface 31 of the first lens 3 and the imaging surface 9 on the optical axis I.

Further, from the first lens 3, the second lens 4, the third lens 5, the fourth lens 6, and the object side faces 31, 41, 51, 61, 71 and the image side faces 32, 42 of the fifth lens 7. , 52, 62, 72, a total of ten faces are aspherical, and the aspherical surface is defined by the following formula:

Where: Y: the distance between the point on the aspheric curve and the optical axis I; Z: the depth of the aspheric surface (the point on the aspheric surface from which the optical axis I is Y, and the tangent to the vertex on the optical axis I of the aspherical surface, The vertical distance between the two); R: the radius of curvature of the lens surface; K: the conic constant; a _{2 i} : the 2ith order aspheric coefficient.

The aspherical coefficients of the image side surface 31 of the first lens 3 to the image side surface 72 of the fifth lens 7 in the formula (1) are as shown in FIG. 5.

In addition, the relationship among the important parameters in the optical imaging lens 10 of the first preferred embodiment is: Gaa/G23=6.40; TL/(T5+G12)=3.25; TL/T2=8.50; TL/(T1+ G12)=3.37; T2/G23=2.25; T2/T4=1.44; TL/(G12+G45)=4.58; TL/G12=5.94; (T3+T5)/T4=4.14; TL/Gaa=2.99; Gaa /(T4+G12)=1.34;(T2+T5)/T1=2.00; Gaa/T2=2.84; (G23+T2)/T4=2.08; T2/(G34+G45)=1.04; Gaa/T3=1.68 (T2+T3)/T1=2.46; and (T2+T3)/T4=3.88.

Wherein TL is the object side surface 31 of the first lens 3 to the fifth lens 7 The distance of the image side surface 72 on the optical axis I; T1 is the thickness of the first lens 3 on the optical axis I; T2 is the thickness of the second lens 4 on the optical axis I; T3 is the third lens 5 The thickness on the optical axis I; T4 is the thickness of the fourth lens 6 on the optical axis I; T5 is the thickness of the fifth lens 7 on the optical axis I; Gaa is the first lens 3 to the fifth lens 7 The four air gaps on the optical axis I are summed; G12 is the air gap of the first lens 3 to the second lens 4 on the optical axis I; G23 is the second lens 4 to the third lens 5 in the light An air gap on the shaft I; G34 is an air gap of the third lens 5 to the fourth lens 6 on the optical axis I; and G45 is an air of the fourth lens 6 to the fifth lens 7 on the optical axis I gap.

Referring to FIG. 3, the drawing of (a) illustrates the longitudinal spherical aberration of the first preferred embodiment, and the drawings of (b) and (c) respectively illustrate the first preferred embodiment. The astigmatism aberration on the imaging surface 9 with respect to the sagittal direction and the astigmatic aberration on the tangential direction, the pattern of (d) illustrates that the first preferred embodiment is Distortion aberration on the imaging surface 9. The longitudinal spherical aberration of the first preferred embodiment is shown in Fig. 3(a), and the curves formed by each of the wavelengths are very close and close to the middle, indicating that each wavelength is different. The height of the off-axis light is concentrated near the imaging point. It can be seen from the deflection amplitude of the curve of each wavelength that the deviation of the imaging point of the off-axis light of different heights is controlled within ±0.06 mm, so this embodiment is obviously The spherical aberration of the same wavelength is improved. In addition, the distances between the three representative wavelengths are also relatively close to each other, and the imaging positions representing the different wavelengths of light are already concentrated, so that the chromatic aberration is also significantly improved.

In the two astigmatic aberration diagrams of Figures 3(b) and 3(c), three The amount of change in the focal length representing the wavelength over the entire field of view falls within ±0.1 mm, indicating that the optical system of the first preferred embodiment can effectively eliminate aberrations. The distortion aberration diagram of FIG. 3(d) shows that the distortion aberration of the first preferred embodiment is maintained within ±2%, indicating that the distortion aberration of the first preferred embodiment has been conformed to the optical system. According to the imaging quality requirement, the first preferred embodiment can provide better imaging quality under the condition that the system length has been shortened to 4.04 mm compared with the prior optical lens. For example, the lens length can be shortened to maintain a thinner product design while maintaining good optical performance.

Referring to FIG. 6, a second embodiment of the optical imaging lens 10 of the present invention is shown. The preferred embodiment is substantially similar to the first preferred embodiment except that the optical data, the aspherical coefficients, and the parameters between the lenses 3, 4, 5, 6, and 7 are somewhat different.

The detailed optical data is shown in FIG. 8, and the overall system focal length of the second preferred embodiment is 1.98 mm, the half angle of view (HFOV) is 48.607°, the aperture value (Fno) is 2.40, and the system length is 4.05 mm.

As shown in FIG. 9, the first of the second preferred embodiment is The aspherical coefficients of the formula (1) are the object side faces 31 of the lens 3 to the image side faces 72 of the fifth lens 7.

In addition, the relationship among the important parameters in the optical imaging lens 10 of the second embodiment is: Gaa/G23=4.57; TL/(T5+G12)=2.51; TL/T2=7.89; TL/(T1+G12 ) = 3.51; T2 / G23 = 2.15; T2 / T4 = 1.90; TL / (G12 + G45) = 5.14; TL / G12 = 6.10; (T3 + T5) / T4 = 6.23; TL / Gaa = 3.70; Gaa / (T4+G12)=1.17; (T2+T5)/T1=2.98; Gaa/T2=2.13; (G23+T2)/T4=2.79; T2/(G34+G45)=2.69; Gaa/T3=1.50; (T2+T3)/T1=2.54; and (T2+T3)/T4=4.61.

Referring to Figure 7, the longitudinal spherical aberration of (a), the image of (b), (c) The astigmatic aberration, and the distortion aberration pattern of (d), can be seen that the second preferred embodiment also maintains good optical performance.

Referring to FIG. 10, a third of the optical imaging lens 10 of the present invention is shown. The preferred embodiment is substantially similar to the first preferred embodiment except that the optical data, the aspherical coefficients, and the parameters between the lenses 3, 4, 5, 6, and 7 are somewhat different.

The detailed optical data is shown in Figure 12, and the third preferred The overall system focal length of the embodiment is 2.05 mm, the half angle of view (HFOV) is 47.62, the aperture value (Fno) is 2.40, and the system length is 3.90 mm.

As shown in FIG. 13, the first of the third preferred embodiment is The object side faces 31 of the lens 3 to the image side faces 72 of the fifth lens 7 are aspherical coefficients in the formula (1).

In addition, the optical imaging lens 10 of the third preferred embodiment The relationship among the important parameters is: Gaa/G23=4.17; TL/(T5+G12)=4.56; TL/T2=3.21; TL/(T1+G12)=4.97; T2/G23=8.72; T2/T4 = 4.15; TL / (G12 + G45) = 10.47; TL / G12 = 12.31; (T3 + T5) / T4 = 4.60; TL / Gaa = 6.72; Gaa/(T4+G12)=0.95; (T2+T5)/T1=3.75; Gaa/T2=0.48; (G23+T2)/T4=4.62; T2/(G34+G45)=9.76; Gaa/T3= 0.72; (T2+T3)/T1=4.32; and (T2+T3)/T4=6.91.

Referring to Figure 11, the longitudinal spherical aberration of (a), (b), (c) The astigmatic aberration, and the distortion aberration pattern of (d), can be seen that the third preferred embodiment can also maintain good optical performance.

Referring to FIG. 14, a fourth embodiment of the optical imaging lens 10 of the present invention is shown. The preferred embodiment is substantially similar to the first preferred embodiment. The main difference between the fourth preferred embodiment and the first preferred embodiment is that the object side surface 41 of the second lens 4 has a convex portion 411 located in the vicinity of the optical axis and a vicinity of the circumference. A concave portion 412 between the regions.

The detailed optical data is shown in Figure 16, and the fourth preferred The overall system focal length of the embodiment is 2.08 mm, the half angle of view (HFOV) is 48.819°, the aperture value (Fno) is 2.40, and the system length is 4.02 mm.

As shown in FIG. 17, the first of the fourth preferred embodiment is The object side faces 31 of the lens 3 to the image side faces 72 of the fifth lens 7 are aspherical coefficients in the formula (1).

In addition, the optical imaging lens 10 of the fourth preferred embodiment The relationship between the important parameters is: Gaa/G23=2.34; TL/(T5+G12)=4.05; TL/T2=4.74; TL/(T1+G12)=4.46; T2/G23=2.12; T2/T4=2.41; TL/(G12+G45 ) = 8.84; TL / G12 = 10.7; (T3 + T5) / T4 = 3.85; TL / Gaa = 4.30; Gaa / (T4 + G12) = 1.29; (T2 + T5) / T1 = 2.78; Gaa / T2 = 1.10; (G23+T2)/T4=3.54; T2/(G34+G45)=5.22; Gaa/T3=1.27; (T2+T3)/T1=3.00; and (T2+T3)/T4=4.50.

Referring to FIG. 15, the longitudinal spherical aberration of (a), the astigmatic aberration of (b), (c), and the distortion aberration diagram of (d) can be seen that the fourth preferred embodiment can also be maintained. Good optical performance.

Referring to Figure 18, a fifth preferred embodiment of the optical imaging lens 10 of the present invention is substantially similar to the first preferred embodiment. The main difference between the fifth preferred embodiment and the first preferred embodiment is The first lens 3 has a negative refractive power, and the object side surface 61 of the fourth lens 6 has a concave surface, and has a concave surface portion 613 in the vicinity of the optical axis I and a concave surface portion 612 located in the vicinity of the circumference.

The detailed optical data is shown in FIG. 20, and the overall system focal length of the fifth preferred embodiment is 2.17 mm, the half angle of view (HFOV) is 45.964°, the aperture value (Fno) is 2.40, and the system length is 4.45 mm. .

As shown in Fig. 21, the aspherical coefficients in the formula (1) are the object side faces 31 of the first lens 3 to the image side faces 72 of the fifth lens 7 of the fifth preferred embodiment.

In addition, the relationship among the important parameters in the optical imaging lens 10 of the fifth preferred embodiment is: Gaa/G23=2.54; TL/(T5+G12)=3.11; TL/T2=7.45; TL/(T1 +G12)=3.51; T2/G23=0.91; T2/T4=1.70; TL/(G12+G45)=4.77; TL/G12=5.27; (T3+T5)/T4=4.01; TL/Gaa=2.66; Gaa/(T4+G12)=1.40; (T2+T5)/T1=2.80; Gaa/T2=2.80; (G23+T2)/T4=3.58; T2/(G34+G45)=3.54; Gaa/T3=2.04; (T2+T3)/T1=3.35; and (T2+T3)/T4=4.04.

Referring to FIG. 19, it can be seen from the longitudinal spherical aberration of (a), the astigmatic aberration of (b), (c), and the distortion aberration diagram of (d) that the fifth preferred embodiment can also be maintained. Good optical performance.

Referring to Figure 22, a sixth preferred embodiment of the optical imaging lens 10 of the present invention is substantially similar to the first preferred embodiment. The main difference between the sixth preferred embodiment and the first preferred embodiment is that the first lens 3 has a negative refractive power, and the object side surface 41 of the second lens 4 has a light axis. A convex portion 411 in the vicinity and a concave portion 412 located in the vicinity of the circumference.

The detailed optical data is shown in Fig. 24, and the overall system focal length of the sixth preferred embodiment is 2.03 mm, the half angle of view (HFOV) is 47.832°, the aperture value (Fno) is 2.40, and the system length is 3.95 mm. .

As shown in Fig. 25, the aspherical coefficients in the formula (1) are the object side faces 31 of the first lens 3 to the image side faces 72 of the fifth lens 7 of the sixth preferred embodiment.

In addition, the relationship between the important parameters in the optical imaging lens 10 of the sixth preferred embodiment is: Gaa/G23=2.27; TL/(T5+G12)=4.06; TL/T2=4.88; TL/(T1+G12)=4.40; T2/G23=1.81; T2/T4=2.28; TL/(G12+G45)=8.11; TL/G12=9.92; (T3+T5)/ T4=3.58; TL/Gaa=3.89; Gaa/(T4+G12)=1.35; (T2+T5)/T1=2.77; Gaa/T2=1.25; (G23+T2)/T4=3.54; T2/(G34 +G45)=4.75; Gaa/T3=1.46; (T2+T3)/T1=3.02; and (T2+T3)/T4=4.25.

Referring to FIG. 23, it can be seen from the longitudinal spherical aberration of (a), the astigmatic aberration of (b), (c), and the distortion aberration diagram of (d) that the sixth preferred embodiment can also be maintained. Good optical performance.

Referring to Figure 26, a seventh preferred embodiment of the optical imaging lens 10 of the present invention is substantially similar to the first preferred embodiment. The main difference between the seventh preferred embodiment and the first preferred embodiment is that the object side surface 41 of the second lens 4 has a convex portion 411 located in the vicinity of the optical axis and a vicinity of the circumference. A concave portion 412 between the regions.

The detailed optical data is shown in Fig. 28, and the overall system focal length of the seventh preferred embodiment is 2.06 mm, the half angle of view (HFOV) is 47.726, the aperture value (Fno) is 2.40, and the system length is 4.04 mm. .

As shown in Fig. 29, the aspherical coefficients in the formula (1) are the object side faces 31 of the first lens 3 of the seventh preferred embodiment to the image side faces 72 of the fifth lens 7.

In addition, the relationship among the important parameters in the optical imaging lens 10 of the seventh preferred embodiment is: Gaa/G23=2.87; TL/(T5+G12)=4.48; TL/T2=3.70; TL/(T1 +G12)=4.01; T2/G23=3.23; T2/T4=3.08; TL/(G12+G45)=7.32; TL/G12=8.72; (T3+T5)/T4=3.03; TL/Gaa=4.16; Gaa/(T4+G12)=1.19; (T2+T5)/T1=2.81; Gaa/T2=0.89; (G23+T2)/T4=4.03; T2/(G34+G45)=6.40; Gaa/T3= 1.53; (T2+T3)/T1=3.17; and (T2+T3)/T4=4.87.

Referring to FIG. 27, it can be seen from the longitudinal spherical aberration of (a), the astigmatic aberration of (b), (c), and the distortion aberration diagram of (d) that the seventh preferred embodiment can be maintained. Good optical performance.

Referring to Fig. 30, an eighth preferred embodiment of the optical imaging lens 10 of the present invention is substantially similar to the first preferred embodiment. The main difference between the eighth preferred embodiment and the first preferred embodiment is that the first lens 3 has a negative refractive power, and the object side surface 41 of the second lens 4 has an optical axis. A convex portion 411 in the vicinity and a concave portion 412 located in the vicinity of the circumference.

The detailed optical data is shown in FIG. 32, and the overall system focal length of the eighth preferred embodiment is 2.07 mm, the half angle of view (HFOV) is 47.628°, the aperture value (Fno) is 2.40, and the system length is 3.89 mm. .

As shown in Fig. 29, the aspherical coefficients in the formula (1) are the object side faces 31 of the first lens 3 of the eighth preferred embodiment to the image side faces 72 of the fifth lens 7.

In addition, the relationship among the important parameters in the optical imaging lens 10 of the eighth preferred embodiment is: Gaa/G23=1.89; TL/(T5+G12)=3.53; TL/T2=7.43; TL/(T1 +G12)=4.57; T2/G23=0.73; T2/T4=1.74; TL/(G12+G45)=6.76; TL/G12=8.70; (T3+T5)/T4=4.32; TL/Gaa=2.86; Gaa/(T4+G12)=1.82; (T2 +T5)/T1=2.91; Gaa/T2=2.60; (G23+T2)/T4=4.14; T2/(G34+G45)=2.71; Gaa/T3=2.11; (T2+T3)/T1=2.89; And (T2+T3)/T4=3.89.

Referring to FIG. 31, it can be seen from the longitudinal spherical aberration of (a), the astigmatic aberration of (b), (c), and the distortion aberration diagram of (d) that the eighth preferred embodiment can also be maintained. Good optical performance.

Referring to FIG. 34, which is a table diagram of the optical parameters of the above eight preferred embodiments, when the relationship between the optical parameters in the optical imaging lens 10 of the present invention satisfies the following conditional formula, the system length is shortened. In this case, there will still be better optical performance, so that when the present invention is applied to a related portable electronic device, a thinner product can be produced:

(1) Gaa/G23 ≦ 6.50; since the amplitude of the air gap G23 of the second lens 4 to the third lens 5 on the optical axis I is small, when this conditional expression is satisfied, there is a preferable configuration. The optical imaging lens 10 The length is shortened. Preferably, Gaa/G23 is between 1.50 and 6.50.

(2) TL / (T5 + G12) ≦ 6.00; since the fifth lens 7 has There is a larger optical effective diameter, and the aperture 2 is disposed between the first lens 3 and the second lens 4, so the thickness T5 of the fifth lens 7 on the optical axis I and the first lens 3 are The air gap G12 of the second lens 4 on the optical axis I is reduced by a small amplitude, and therefore, when this conditional expression is satisfied, a preferable configuration is made to shorten the length of the optical imaging lens 10. Preferably, TL/(T5+G12) is between 2.10 and 6.00.

(3) TL/T2 ≦ 8.50; since the second lens 4 is on the optical axis I The thickness reduction T2 is small in amplitude, so that when this conditional expression is satisfied, a preferred configuration is made to shorten the length of the optical imaging lens 10. Preferably, TL/T2 is between 3.00 and 8.50.

(4) TL / (T1 + G12) ≦ 5; since the first lens 3 is on the optical axis The thickness T1 on I and the air gap G12 of the first lens 3 to the second lens 4 on the optical axis I are smaller, so that when the conditional expression is satisfied, the optical imaging lens is preferably configured. 10 length is shortened. Preferably, TL/(T1+G12) is between 3.00 and 5.00.

(5) 0.68 ≦ T2 / G23; compared to the second lens 4 in the optical axis In the thickness T2 on I, the air gap G23 of the second lens 4 to the third lens 5 on the optical axis I is reduced by a large amplitude, so that when this relationship is satisfied, a preferred configuration is obtained. Preferably, T2/G23 is between 0.68 and 9.30.

(6) 1.00 ≦ T2 / T4; compared to the second lens 4 on the optical axis I In the upper thickness T2, the thickness T4 of the fourth lens 6 on the optical axis I is greatly reduced, so that when the relationship is satisfied, there is a preferable arrangement. Preferably, T2/T4 is between 1.00 and 2.50.

(7) 4.30 ≦ TL (G12 + G45) ≦ 11.00; due to the aperture 2 Between the first lens 3 and the second lens 4, the air gap G12 of the first lens 3 to the second lens 4 on the optical axis I is reduced by a small extent, but it cannot be too large, otherwise it may be disadvantageous. Since the length of the optical imaging lens 10 is shortened, a better configuration is obtained when the conditional expression is satisfied.

(8) TL/G12 ≦ 16.00; since the aperture 2 is placed in the first Between the lens 3 and the second lens 4, the air gap G12 of the first lens 3 to the second lens 4 on the optical axis I is reduced by a small extent, but it cannot be too large, otherwise the optical imaging lens may be disadvantageous. The length of 10 is shortened, so that a better configuration is satisfied when this conditional expression is satisfied. Preferably, TL/G12 is between 5.50 and 16.00.

(9) 2.20 ≦ (T3 + T5) / T4; compared to the fourth lens 6 The thickness T4 on the optical axis I, the thickness T3 of the third lens 5 on the optical axis I and the thickness T5 of the fifth lens 7 on the optical axis I are smaller, so when the relationship is satisfied , there is a better configuration. Preferably, (T3+T5)/T4 is between 2.20 and 6.50.

(10) 3.50 ≦ TL / Gaa; to shorten the optical imaging lens 10 The length will shorten the air gap, so when this relationship is satisfied, there is a better configuration. Preferably, TL/Gaa is between 3.50 and 7.00.

(11) Gaa/(T4+G12)≦2.35; when this conditional expression is satisfied, The air gap and the thickness of the fourth lens 6 are preferably arranged to shorten the length of the optical imaging lens 10. Preferably, Gaa/(T4+G12) is between 0.60 and 2.35.

(12) 2.00 ≦ (T2+T5) / T1; compared to the second lens 4 The thickness T2 on the optical axis I and the thickness T5 of the fifth lens 7 on the optical axis I, the thickness T1 of the first lens 3 on the optical axis I is shortened by a large extent, so when the relationship is satisfied, There is a better configuration. Preferably, (T2+T5)/T1 is between 2.00 and 4.00.

(13) Gaa/T2 ≦ 2.85; due to the first lens 3 to the first The total width of the four air gaps Gaa of the five lenses 7 on the optical axis I is larger, and the thickness T2 of the second lens 4 on the optical axis I is smaller, so when the relationship is satisfied, There is a better configuration. Preferably, Gaa/T2 is between 0.30 and 2.85.

(14) 2.80 ≦ (G12 + T2) / T4; compared to the second lens 4 The thickness T4 of the fourth lens 6 on the optical axis I is shortened to a large extent by the air gap G23 of the third lens 5 on the optical axis I and the thickness T2 of the second lens 4 on the optical axis I. Therefore, when this relationship is satisfied, there is a better configuration. Preferably, (G12+T2)/T4 is between 2.80 and 5.00.

(15) 1.8 ≦ T2 / (G34 + G45); compared to the second lens 4 The air gap G34 of the third lens 5 to the fourth lens 6 on the optical axis I and the air of the fourth lens 6 to the fifth lens 7 on the optical axis I in terms of the thickness T2 on the optical axis I The gap G45 is shortened to a large extent, so when this relationship is satisfied, there is a better configuration. Preferably, T2/(G34+G45) is between 1.80 and 6.70.

(16) Gaa/T3≦2.3; due to the first lens 3 to the fifth The width of the four air gaps of the lens 7 on the optical axis I is larger, and the thickness T3 of the third lens 5 on the optical axis I is smaller. Therefore, when this relationship is satisfied, there is a better configuration. Preferably, Gaa/T3 is between 0.50 and 2.30.

(17) 2.5 ≦ (T2+T3) / T1; compared to the first lens 3 The thickness T1 on the optical axis I, the thickness T2 of the second lens 4 on the optical axis I and the thickness T3 of the third lens 5 on the optical axis I are smaller, so when the relationship is satisfied , there is a better configuration. Preferably, (T2+T3)/T1 is between 2.50 and 4.70.

(18) 2.70 ≦ (T2+T3) / T4; compared to the fourth lens 6 In the thickness T4 on the optical axis I, the thickness T2 of the second lens 4 on the optical axis I and the thickness T3 of the third lens 5 on the optical axis I are smaller, so when this relationship is satisfied When there is a better configuration. Preferably, (T2+T3)/T4 is between 2.7 and 7.3.

In summary, the optical imaging lens 10 of the present invention can achieve the following effects and advantages, and thus achieve the object of the present invention:

1. The object side surface 31 of the first lens 3 has a convex portion 311 located in the vicinity of the circumference, and the image side surface 52 of the third lens 5 has a convex portion 521 located in the vicinity of the optical axis I, the first The image side surface 62 of the four lens 6 has a concave surface portion 621 located in the vicinity of the optical axis I, and is disposed between the first lens 3 and the second lens 4 in cooperation with the aperture 2, thereby facilitating correction of aberrations to ensure optical imaging. The imaging quality of the lens. The material of the fifth lens 7 is plastic, which can reduce the manufacturing cost and reduce the weight of the optical imaging lens 10.

Second, the present invention is controlled by related design parameters, such as Gaa/G23, TL/(T5+G12), TL/T2, TL/(T1+G12), Gaa/(T4+G12) Such parameters, so that the entire system has better ability to eliminate aberrations, such as the ability to eliminate spherical aberration, and then cooperate with the lenses 3, 4, 5, 6, 7 side 31, 41, 51, 61, 71 or image side The concave-convex shape design and arrangement of 32, 42, 52, 62, and 72 enable the optical imaging lens 10 to have optical performance capable of effectively overcoming chromatic aberration and provide better image quality under the condition of shortening the length of the system.

Third, by the description of the eight preferred embodiments described above, the present disclosure is shown With the design of the optical imaging lens 10, the system length of the preferred embodiments can be shortened to about 4 mm. Compared with the existing optical imaging lens, the lens of the present invention can be used to manufacture a thinner product. The invention has economic benefits in line with market demand.

Referring to FIG. 35, the application of the optical imaging lens 10 described above is applied. In a first preferred embodiment of the sub-device 1, the electronic device 1 includes a casing 11 and an image module 12 mounted in the casing 11. The electronic device 1 is described here by taking only a mobile phone as an example, but the type of the electronic device 1 is not limited thereto.

The image module 12 includes the optical imaging mirror as described above a head 10, a lens barrel 21 for the optical imaging lens 10, a module rear seat unit 120 for the lens barrel 21, and image sensing disposed on the image side of the optical imaging lens 10 130. The imaging surface 9 (see FIG. 2) is formed on the image sensor 130.

The module rear seat unit 120 has a lens rear seat 121, and a The image sensor rear seat 122 is disposed between the lens rear seat 121 and the image sensor 130. Wherein, the lens barrel 21 is along with the lens rear seat 121 The axis II is coaxially disposed, and the lens barrel 21 is disposed inside the lens rear seat 121.

Referring to FIG. 36, the application of the optical imaging lens 10 described above is applied. A second preferred embodiment of the sub-device 1, the main difference between the second preferred embodiment and the electronic device 1 of the first preferred embodiment is that the module rear seat unit 120 is a voice coil motor (VCM). ) type. The lens rear seat 121 has a first seat body 123 disposed on the outer side of the lens barrel 21 and disposed along an axis III, and a second seat body disposed along the axis III and surrounding the outer side of the first seat body 123. 124. A coil 125 disposed between the outer side of the first base 123 and the inner side of the second base 124, and a magnetic element 126 disposed between the outer side of the coil 125 and the inner side of the second base 124.

The first seat 123 of the lens rear seat 121 can carry the lens barrel 21 and the optical imaging lens 10 disposed in the lens barrel 21 are moved along the axis III. The image sensor rear seat 122 is in contact with the second base 124. The filter 8 is disposed on the image sensor rear seat 122. Other components of the second preferred embodiment of the electronic device 1 are similar to those of the electronic device 1 of the first preferred embodiment, and are not described herein again.

By mounting the optical imaging lens 10, due to the optical imaging The system length of the lens 10 can be effectively shortened, so that the thickness of the first preferred embodiment and the second preferred embodiment of the electronic device 1 can be relatively reduced to produce a thinner product, and still provide good optics. The performance and imaging quality, thereby making the electronic device 1 of the present invention have the economic benefits of reducing the amount of material used in the casing, and can also meet the design trend and consumer demand of thin and light products.

However, the above is only the preferred embodiment of the present invention. The scope of the present invention is not limited thereto, that is, the simple equivalent changes and modifications made by the present invention in the scope of the invention and the patent specification are still within the scope of the invention.

10‧‧‧Optical imaging lens

2‧‧‧ aperture

3‧‧‧first lens

31‧‧‧ ‧ side

311‧‧‧ convex face

32‧‧‧like side

4‧‧‧second lens

41‧‧‧ ‧ side

42‧‧‧like side

5‧‧‧ third lens

51‧‧‧ ‧ side

52‧‧‧like side

521‧‧‧ convex face

6‧‧‧Fourth lens

61‧‧‧ ‧ side

611‧‧‧ convex face

612‧‧‧ concave face

62‧‧‧like side

621‧‧‧ concave face

622‧‧‧ convex face

7‧‧‧ fifth lens

71‧‧‧ ‧ side

711‧‧ ‧ convex face

712‧‧‧ concave face

72‧‧‧like side

721‧‧‧ concave face

722‧‧‧ convex face

8‧‧‧Filter

81‧‧‧ ‧ side

82‧‧‧like side

9‧‧‧ imaging surface

I‧‧‧ optical axis

Claims (20)

An optical imaging lens includes a first lens, an aperture, a second lens, a third lens, a fourth lens, and a fifth lens sequentially along an optical axis from the object side to the image side, and the fifth lens A lens to the fifth lens both include an object side facing the object side and passing the imaging light and an image side facing the image side and passing the imaging light; the object side of the first lens has a region near the circumference. a convex surface; the image side of the third lens has a convex portion located in the vicinity of the optical axis; the image side of the fourth lens has a concave surface located in the vicinity of the optical axis; and the fifth lens is made of plastic Wherein the optical imaging lens has only five lenses having a refractive power, and the first, second, third, fourth, and fifth lenses have an air gap therebetween, and the first lens to the fifth lens are on the optical axis The upper four air gaps are summed to Gaa, and the air gap between the second lens and the third lens on the optical axis is G23, and the following conditional expression is satisfied: Gaa/G23 ≦ 6.50. The optical imaging lens of claim 1, wherein the thickness of the fifth lens on the optical axis is T5, and the air gap of the first lens and the second lens on the optical axis is G12, the first lens The distance from the side of the object to the image side of the fifth lens on the optical axis is TL, and the following conditional expression is satisfied: TL / (T5 + G12) ≦ 6.00. The optical imaging lens of claim 2, wherein the second lens is The thickness on the optical axis is T2, and the following conditional expression is satisfied: TL/T2 ≦ 8.50. The optical imaging lens according to claim 2, wherein the first lens has a thickness T1 on the optical axis and satisfies the following conditional formula: TL / (T1 + G12) ≦ 5.00. The optical imaging lens according to claim 4, wherein the second lens has a thickness T2 on the optical axis and satisfies the following conditional formula: 0.68 ≦ T2 / G23. The optical imaging lens according to claim 4, wherein the thickness of the second lens on the optical axis is T2, the thickness of the fourth lens on the optical axis is T4, and the following conditional expression is satisfied: 1.00 ≦ T2 / T4 . The optical imaging lens according to claim 6, wherein an air gap of the fourth lens and the fifth lens on the optical axis is G45, and the following conditional expression is satisfied: 4.30 ≦ TL / (G12 + G45) ≦ 11.00. The optical imaging lens according to claim 2, wherein the following conditional expression is further satisfied: TL/G12≦16.00. The optical imaging lens according to claim 8, wherein the thickness of the third lens on the optical axis is T3, the thickness of the fourth lens on the optical axis is T4, and the following conditional expression is satisfied: 2.20 ≦ (T3+ T5)/T4. The optical imaging lens according to claim 9, wherein the following conditional expression is further satisfied: 3.50 ≦ TL / Gaa. The optical imaging lens according to claim 2, wherein the fourth lens has a thickness T4 on the optical axis and satisfies the following conditional expression: Gaa / (T4 + G12) ≦ 2.35. The optical imaging lens according to claim 11, wherein the first lens has a thickness T1 on the optical axis, and the thickness of the second lens on the optical axis is T2, and satisfies the following conditional formula: 2.00 ≦ (T2+T5)/T1. The optical imaging lens according to claim 12, wherein the following conditional expression is further satisfied: Gaa/T2 ≦ 2.85. The optical imaging lens of claim 1, wherein the first lens has a thickness T1 on the optical axis, and the air gap of the first lens and the second lens on the optical axis is G12, the first lens The distance from the side of the object to the image side of the fifth lens on the optical axis is TL, and the following conditional expression is satisfied: TL / (T1 + G12) ≦ 5.00. The optical imaging lens of claim 14, wherein the second lens has a thickness T2 on the optical axis, the fourth lens has a thickness T4 on the optical axis, and the second lens and the third lens are in the light. The air gap on the shaft is G23 and satisfies the following conditional formula: 2.80 ≦ (G23 + T2) / T4. The optical imaging lens of claim 15, wherein an air gap of the third lens and the fourth lens on the optical axis is G34, and an air gap of the fourth lens and the fifth lens on the optical axis is G45. And satisfy the following conditional formula: 1.80 ≦ T2 / (G34 + G45). The optical imaging lens according to claim 15, wherein the second lens has a thickness T2 on the optical axis and satisfies the following conditional expressions: Gaa/T3≦2.30 and 2.50≦(T2+T3)/T1. The optical imaging lens of claim 1, wherein the second lens has a thickness T2 on the optical axis, and the distance from the object side of the first lens to the image side of the fifth lens on the optical axis is TL, and satisfy the following conditional formula: TL/T2≦8.50. The optical imaging lens of claim 18, wherein the third lens The thickness on the optical axis is T3, and the thickness of the fourth lens on the optical axis is T4, and the following conditional expression is satisfied: 2.70 ≦ (T2+T3)/T4. An electronic device comprising: a casing; and an image module mounted in the casing, and comprising an optical imaging lens according to any one of claim 1 to claim 19, The optical imaging lens is provided with a lens barrel, a module rear seat unit for the lens barrel, and an image sensor disposed on the image side of the optical imaging lens.